I feed a rotation diet and always give a bowl of 50/50 for a better transition, but she always picks out the new stuff and leaves the old food spit out on the floor.
It's a bit difficult to transition when they won't eat their food.
You said she'll eat it if it's topped with canned for flavor; so I'd just switch the kibble slowly as you would, but keep adding the canned and slowly then start weaning her from the soft food.
Hope that helps.
